Fatal error: Uncaught Error: Class 'TYPO3\CMS\Core\Utility\ExtensionManagementUtility' not found in /home/.sites/884/site2951/web/test/luger/typo3conf/ext/bootstrap_grids/Configuration/TCA/Overrides/sys_template.php:3
Stack trace:
#0 {main}
  thrown in /home/.sites/884/site2951/web/test/luger/typo3conf/ext/bootstrap_grids/Configuration/TCA/Overrides/sys_template.php on line 3